Problems from Spotify Challenge 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
All Just A Dream 1549 362 23% 0.05 244 172 70% 6.6
Cat Coat Colors 155 68 44% 0.00 62 55 89% 3.5
Imperial Measurement 1233 557 45% 0.00 506 465 92% 2.1
Peer Streaming 23 9 39% 0.04 13 9 69% 7.0
Playlist 137 26 19% 1.09 23 10 43% 9.1
Primary Register 904 551 61% 0.00 473 441 93% 2.1
Square Pie 224 98 44% 0.07 30 21 70% 7.3
Wheel Game 30 9 30% 0.00 12 9 75% 6.9